based upon a suggestion in c.l.py, this slight expansion of the

Skip Montanaro · Skip Montanaro · commit bafedecc0617 · 2001-09-13T19:05:30.000Z
OverflowError message seems reasonable.
diff --git a/Objects/longobject.c b/Objects/longobject.c
@@ -211,7 +211,7 @@ PyLong_AsLong(PyObject *vv)
 
  overflow:
 	PyErr_SetString(PyExc_OverflowError,
-			"long int too large to convert");
+			"long int too large to convert to int");
 	return -1;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -211,7 +211,7 @@ PyLong_AsLong(PyObject *vv)`
`211`	`211`
`212`	`212`	`overflow:`
`213`	`213`	`PyErr_SetString(PyExc_OverflowError,`
`214`		`- "long int too large to convert");`
	`214`	`+ "long int too large to convert to int");`
`215`	`215`	`return -1;`
`216`	`216`	`}`
`217`	`217`